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he lumbricals flex the fingers at the metacarpophalangeal (knuckle) joints, and extend the fingers at the...

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Medical Sciences

he lumbricals flex the fingers at the metacarpophalangeal(knuckle) joints, and extend the fingers at the interphalangealjoints. On a model, examine the path of these muscles and speculatewhy they act as flexors at one joint and extensors at another.

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LUMBRICAL FORM ORIGIN INSERTION NERVE SUPPLY FIRST Unipennate Origin from the radial side of the most radial tendon of the flexor digitorum profundus Corresponding Index Finger Passes posteriorly along the radial side of the index finger to insert on the extensor expansion near Metacarpophalangeal Joints MEDIAN NERVE SECOND Unipennate Origin from the radial side of the second most radial tendon of the flexor digitorum profundus Corresponding to Middle Finger Passes posteriorly along the radial side of the middle finger and inserts on the    See Answer
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